monochrome
n
1 a black-and-white photograph or transparency
2 (Photog) black and white
a a painting, drawing, etc., done in a range of tones of a single colour
b the technique or art of this
4 modifier executed in or resembling monochrome
a monochrome print
adj
5 devoid of any distinctive or stimulating characteristics, (Also called (for senses 3, 4))
monotint
(C17: via Medieval Latin from Greek monokhromos of one colour)
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monochromic, monochromical adj
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monochromist n